PT-2023-18187 · Nunjucks+1 · Nunjucks+1

Blaiddx64 + 1 · Published 2023-04-20 · Updated 2025-06-24 · CVE-2023-2142

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Nunjucks versions prior to 3.2.4

Description The issue allows bypassing the restrictions provided by the autoescape functionality in Nunjucks. If two user-controlled parameters are on the same line in the views, it is possible to inject cross-site scripting payloads using the backslash character. This can be achieved when user-controlled parameters are used in a way that allows injection of malicious scripts.

Recommendations For versions prior to 3.2.4, update to version 3.2.4 to resolve the issue. As a temporary workaround, consider restricting the use of user-controlled parameters on the same line in views to minimize the risk of exploitation. Avoid using the backslash character in user-controlled parameters until the issue is resolved.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-2142

GHSA-X77J-W7WF-FJMW

Affected Products

Debian

Nunjucks

References · 20

• https://github.com/mozilla/nunjucks/security/advisories/GHSA-x77j-w7wf-fjmw · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-2142 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-2142 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-2142 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-2142 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2142 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-2142 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-2142 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-2142 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/node-nunjucks · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-x77j-w7wf-fjmw · Vendor Advisory
• https://github.com/mozilla/nunjucks/commit/ec16d210e7e13f862eccdb0bc9af9f60ff6749d6 · Note
• https://github.com/mozilla/nunjucks/pull/1437 · Note
• https://github.com/mozilla/nunjucks · Note
• https://github.com/mozilla/nunjucks/releases/tag/v3.2.4 · Note